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Diffstat (limited to 'V8Binding/v8/src/arm/regexp-macro-assembler-arm.h')
| -rw-r--r-- | V8Binding/v8/src/arm/regexp-macro-assembler-arm.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/V8Binding/v8/src/arm/regexp-macro-assembler-arm.h b/V8Binding/v8/src/arm/regexp-macro-assembler-arm.h index de55183..0711ac1 100644 --- a/V8Binding/v8/src/arm/regexp-macro-assembler-arm.h +++ b/V8Binding/v8/src/arm/regexp-macro-assembler-arm.h @@ -31,12 +31,238 @@ namespace v8 { namespace internal { + +#ifndef V8_NATIVE_REGEXP class RegExpMacroAssemblerARM: public RegExpMacroAssembler { public: RegExpMacroAssemblerARM(); virtual ~RegExpMacroAssemblerARM(); }; +#else +class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler { + public: + RegExpMacroAssemblerARM(Mode mode, int registers_to_save); + virtual ~RegExpMacroAssemblerARM(); + virtual int stack_limit_slack(); + virtual void AdvanceCurrentPosition(int by); + virtual void AdvanceRegister(int reg, int by); + virtual void Backtrack(); + virtual void Bind(Label* label); + virtual void CheckAtStart(Label* on_at_start); + virtual void CheckCharacter(uint32_t c, Label* on_equal); + virtual void CheckCharacterAfterAnd(uint32_t c, + uint32_t mask, + Label* on_equal); + virtual void CheckCharacterGT(uc16 limit, Label* on_greater); + virtual void CheckCharacterLT(uc16 limit, Label* on_less); + virtual void CheckCharacters(Vector<const uc16> str, + int cp_offset, + Label* on_failure, + bool check_end_of_string); + // A "greedy loop" is a loop that is both greedy and with a simple + // body. It has a particularly simple implementation. + virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); + virtual void CheckNotAtStart(Label* on_not_at_start); + virtual void CheckNotBackReference(int start_reg, Label* on_no_match); + virtual void CheckNotBackReferenceIgnoreCase(int start_reg, + Label* on_no_match); + virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal); + virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal); + virtual void CheckNotCharacterAfterAnd(uint32_t c, + uint32_t mask, + Label* on_not_equal); + virtual void CheckNotCharacterAfterMinusAnd(uc16 c, + uc16 minus, + uc16 mask, + Label* on_not_equal); + // Checks whether the given offset from the current position is before + // the end of the string. + virtual void CheckPosition(int cp_offset, Label* on_outside_input); + virtual bool CheckSpecialCharacterClass(uc16 type, + int cp_offset, + bool check_offset, + Label* on_no_match); + virtual void Fail(); + virtual Handle<Object> GetCode(Handle<String> source); + virtual void GoTo(Label* label); + virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); + virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); + virtual void IfRegisterEqPos(int reg, Label* if_eq); + virtual IrregexpImplementation Implementation(); + virtual void LoadCurrentCharacter(int cp_offset, + Label* on_end_of_input, + bool check_bounds = true, + int characters = 1); + virtual void PopCurrentPosition(); + virtual void PopRegister(int register_index); + virtual void PushBacktrack(Label* label); + virtual void PushCurrentPosition(); + virtual void PushRegister(int register_index, + StackCheckFlag check_stack_limit); + virtual void ReadCurrentPositionFromRegister(int reg); + virtual void ReadStackPointerFromRegister(int reg); + virtual void SetRegister(int register_index, int to); + virtual void Succeed(); + virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); + virtual void ClearRegisters(int reg_from, int reg_to); + virtual void WriteStackPointerToRegister(int reg); + + // Called from RegExp if the stack-guard is triggered. + // If the code object is relocated, the return address is fixed before + // returning. + static int CheckStackGuardState(Address* return_address, + Code* re_code, + Address re_frame); + private: + // Offsets from frame_pointer() of function parameters and stored registers. + static const int kFramePointer = 0; + + // Above the frame pointer - Stored registers and stack passed parameters. + // Register 4..11. + static const int kStoredRegisters = kFramePointer; + // Return address (stored from link register, read into pc on return). + static const int kReturnAddress = kStoredRegisters + 8 * kPointerSize; + // Stack parameters placed by caller. + static const int kRegisterOutput = kReturnAddress + kPointerSize; + static const int kAtStart = kRegisterOutput + kPointerSize; + static const int kStackHighEnd = kAtStart + kPointerSize; + + // Below the frame pointer. + // Register parameters stored by setup code. + static const int kInputEnd = kFramePointer - kPointerSize; + static const int kInputStart = kInputEnd - kPointerSize; + static const int kStartIndex = kInputStart - kPointerSize; + static const int kInputString = kStartIndex - kPointerSize; + // When adding local variables remember to push space for them in + // the frame in GetCode. + static const int kInputStartMinusOne = kInputString - kPointerSize; + // First register address. Following registers are below it on the stack. + static const int kRegisterZero = kInputStartMinusOne - kPointerSize; + + // Initial size of code buffer. + static const size_t kRegExpCodeSize = 1024; + + static const int kBacktrackConstantPoolSize = 4; + + // Load a number of characters at the given offset from the + // current position, into the current-character register. + void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); + + // Check whether preemption has been requested. + void CheckPreemption(); + + // Check whether we are exceeding the stack limit on the backtrack stack. + void CheckStackLimit(); + + void EmitBacktrackConstantPool(); + int GetBacktrackConstantPoolEntry(); + + + // Generate a call to CheckStackGuardState. + void CallCheckStackGuardState(Register scratch); + + // The ebp-relative location of a regexp register. + MemOperand register_location(int register_index); + + // Register holding the current input position as negative offset from + // the end of the string. + inline Register current_input_offset() { return r6; } + + // The register containing the current character after LoadCurrentCharacter. + inline Register current_character() { return r7; } + + // Register holding address of the end of the input string. + inline Register end_of_input_address() { return r10; } + + // Register holding the frame address. Local variables, parameters and + // regexp registers are addressed relative to this. + inline Register frame_pointer() { return fp; } + + // The register containing the backtrack stack top. Provides a meaningful + // name to the register. + inline Register backtrack_stackpointer() { return r8; } + + // Register holding pointer to the current code object. + inline Register code_pointer() { return r5; } + + // Byte size of chars in the string to match (decided by the Mode argument) + inline int char_size() { return static_cast<int>(mode_); } + + // Equivalent to a conditional branch to the label, unless the label + // is NULL, in which case it is a conditional Backtrack. + void BranchOrBacktrack(Condition condition, Label* to); + + // Call and return internally in the generated code in a way that + // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) + inline void SafeCall(Label* to, Condition cond = al); + inline void SafeReturn(); + inline void SafeCallTarget(Label* name); + + // Pushes the value of a register on the backtrack stack. Decrements the + // stack pointer by a word size and stores the register's value there. + inline void Push(Register source); + + // Pops a value from the backtrack stack. Reads the word at the stack pointer + // and increments it by a word size. + inline void Pop(Register target); + + // Before calling a C-function from generated code, align arguments on stack. + // After aligning the frame, non-register arguments must be stored in + // sp[0], sp[4], etc., not pushed. The argument count assumes all arguments + // are word sized. + // Some compilers/platforms require the stack to be aligned when calling + // C++ code. + // Needs a scratch register to do some arithmetic. This register will be + // trashed. + inline void FrameAlign(int num_arguments, Register scratch); + + // Calls a C function and cleans up the space for arguments allocated + // by FrameAlign. The called function is not allowed to trigger a garbage + // collection. + inline void CallCFunction(ExternalReference function, + int num_arguments); + + // Calls a C function and cleans up the frame alignment done by + // by FrameAlign. The called function *is* allowed to trigger a garbage + // collection, but may not take more than four arguments (no arguments + // passed on the stack), and the first argument will be a pointer to the + // return address. + inline void CallCFunctionUsingStub(ExternalReference function, + int num_arguments); + + + MacroAssembler* masm_; + + // Which mode to generate code for (ASCII or UC16). + Mode mode_; + + // One greater than maximal register index actually used. + int num_registers_; + + // Number of registers to output at the end (the saved registers + // are always 0..num_saved_registers_-1) + int num_saved_registers_; + + // Manage a small pre-allocated pool for writing label targets + // to for pushing backtrack addresses. + int backtrack_constant_pool_offset_; + int backtrack_constant_pool_capacity_; + + // Labels used internally. + Label entry_label_; + Label start_label_; + Label success_label_; + Label backtrack_label_; + Label exit_label_; + Label check_preempt_label_; + Label stack_overflow_label_; +}; + + +#endif // V8_NATIVE_REGEXP + + }} // namespace v8::internal #endif // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_ |